211052249478 has 96 divisors (see below), whose sum is σ = 525501440256. Its totient is φ = 59967376704.

The previous prime is 211052249477. The next prime is 211052249479. The reversal of 211052249478 is 874942250112.

211052249478 is a `hidden beast` number, since 2 + 1 + 10 + 522 + 49 + 4 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (211052249477) and next prime (211052249479).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211052249477) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18643476 + ... + 18654792.

It is an arithmetic number, because the mean of its divisors is an integer number (5473973336).

Almost surely, 2^211052249478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211052249478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262750720128).

211052249478 is an abundant number, since it is smaller than the sum of its proper divisors (314449190778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211052249478 is a wasteful number, since it uses less digits than its factorization.

211052249478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12138 (or 12135 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 211052249478 in words is "two hundred eleven billion, fifty-two million, two hundred forty-nine thousand, four hundred seventy-eight".